Features: 1. Wide voltage design (12-24V wide voltage design, universal for cars and trucks, suitable for various standard on-board conversion plugs) 2. USB support (2 USB interfaces meet the needs of various electronic devices at the same time, suitable for mobile phones, IPAD, digital cameras, etc.) 3. Streamlined shape (with switch and waterproof cap, small and exquisite design, easy to install, and complement each other with your car) 4. Fast charging (smart power IC, stable current output without fluctuation; low resistance wire, strong current conduction, safe and stable) 5. Five intelligent protections (overcurrent protection, voltage stabilization protection, overcharge protection, overdischarge protection, short circuit protection) 6. High-brightne LED light (three-digit digital tube display, monitor the battery voltage from time to time, make the battery work under normal voltage, extend and protect the service life of the battery and the engine) Precautions: *The car cigarette lighter socket cannot be used to light cigarettes! *The wiring of the car cigarette lighter socket cannot be positively and negatively modulated to avoid burning out the electronic products!